Windows XP Stereo Mix record setting no longer working

Source: http://www.techsupportforum.com/forums/f23/no-stereo-mix-at-all-heelp-mee-262036.html#post2491942

My desktop is running on XP (32bit) SP3, with Realtek HD audio (ALC 888 chipset). I had the same problem with missing stereo mix. The realtek HD audio manager (under the mixer tab) had the stereo mix, microphone & line volume controls greyed out. Audacity would not show stereo mix but only line in. CamStudio could not record audio being played on the speakers.

To solve the problem, I did the following:

1. unzipped & copied the extracted file rtkhdaud.dat file into c:\windows\system32\drivers folder on my system (the folder already contained rtkhdaud.sys file; I retained that file).
2. Rebooted the system
3. RTK HD audio manager now had functioning buttons & sliders that were greyed out earlier.

Source of the file: Realtek tech support.

Download file from link below:

rtkhdaud

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